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The foundation of this system provides a good reference to promote the standardization and intelligence of the overhaul and maintenance of vacuum switches. This paper develops a special HF pulse power supply for internal pressure estimation, which achieves the output of HF-HV sinusoidal pulse wave whose frequency and amplitude can be modified respectively, and meets the design requirements according to the results of Simulink simulation and practical experiments. With the help of AT89S52, this paper designs an I~2C serial bus based signal detection system for peak value signal acquisition of HF pulse currents, which communicates with the upper computer by asynchronous serial communication for uploading the data. In the upper computer, a human computer interface is developed by Matlab software, whose functions are to do some computation and graphic display, such as calibrating the relation curve of vacuum degree and peak value of HF pulse currents, vacuum degree computation, and vacuum lifetime evaluation analysis basing on grey forecasting model as well as making relative suggestions.

本文研制了用于真空度检测的高频脉冲电源,通过Simulink仿真和试验检验其满足设计要求,实现了电压幅值和频率独立可调的正弦波高频高压脉冲输出;利用以AT89S52为核心基于I~2C串行总线的信号检测系统实现高频脉冲电流峰值信号的采集,通过异步串行通信实现单片机与计算机之间的数据通信,将检测数据传至上位机;在上位机利用Matlab开发人机交互界面,实现相关数据处理和图形显示,包括真空度——高频脉冲电流峰值关系曲线标定、真空度数值计算、基于灰色预测模型的真空寿命评估分析和提出相应决策建议。

Then, this paper brings forward a function of city transportation efficiency on the base of mode configuration by researching the final goal of optimizing traffic structure. It also take some restrict conditions into account in the course of optimizing traffic structure, for instance, occupying land area, environment, energy source, attainability etc. Sequentially, this paper sets up a lineal planning model of optimizing traffic structure of big city passenger transport. It takes ZhengZhou for an example to explain how to resolve the model.

接着,文中通过研究交通结构优化追求的最终目标,提出了基于方式结构的城市交通运输效率函数,并以其为目标函数,结合城市居民的出行需求、交通环境容量、道路资源、交通可达性、交通能耗、各交通方式的发展规模等约束条件,建立了大城市客运交通结构优化的线性数学规划模型,以郑州市2010年的交通结构优化为实例,说明了模型参数的标定和求解方法。

To design a basic evaluation model of attribute data in GIS, using various theory of data quality, this paper makes a deep analysis of quality control and evaluation of attribute data and brings forward a effective measure against error in attribute data. A good method is presented to improve precision of attribute data in this paper.

为了给出一个GIS属性数据质量评价的基本模型,结合已有的数据质量理论,本文对属性数据的质量控制与评价进行了深入分析与研究,给出了GIS属性数据质量控制的有效措施,并提出了提高属性数据存储、操作精度的方法。

In this paper Using the single linear array CCD and the principle of autocollimation measuring angle, a novel method for measuring two-dimensional small angle is presented in the paper, in which the single linear array CCD combines with N pattern reticule to trace and measure simultaneously two-dimensional small angle with high measuring frequency.

本文采用单一线阵CCD原理及自准测角、一种测量二维小角度介绍文章其中单一线阵CCD模式结合镜头氮同步跟踪测量二维小角测量频率高。

This paper designs shielding and guarding for the circuits, aimed to enhance the stability and reduce error. At last, this paper calibrate the system is using autocollimator and 12 edge glass, and gives the position error, repeatability and acceleration feature.

最后,本文对设计的测角系统进行了实验测试,实验和分析结果表明,本课题所设计的测角系统,其位置精度、测角重复性和加速度性能均满足系统设计要求。

"This paper, my friend," said Faria,"I may now avow to you, since I have the proof of your fidelity--this paper is my treasure, of which, from this day forth, one-half belongs to you."

"这片纸,我的朋友,"法利亚说,既然我已经考验过你了,现在可以把我的秘密告诉你了,这片纸就是我的宝藏。

This paper,by means of the unified model of vehicle-track systems,performs a simulating calculation of the railway track and vehicle,caused by track stiffness change.On the basis of simulation calculation,this paper tries to analyze the influence of track stiffness change on axle box acceleration with wavelet and power spectrum density.

据此运用车辆-轨道垂向系统统一模型对不同轨道刚度情况下引起的车辆和轨道响应进行了仿真计算,并对计算结果进行小波分析和功率谱处理,主要分析了钢轨、轨下垫层、道床刚度的变化对客车轴箱加速度的影响,同时对用客车轴箱加速度的变化反推道床的刚度状态进行了探索。

The next time a trainer passes, she tears off a piece of paper to give to the trainer. After a fish-reward, she goes back down, tears off another piece of paper, gets another fish, and so on.

当训练员经过时,她把那张纸撕下一小片交给训练员,换回小鱼;接着再次回到池底,再撕下一小片纸,换回另一条小鱼。。。。

This paper provides an advanced technology of remote data acquisition. It uses intimate wireless data transmission technology and GPRS data transmission technology in automation control system. In this way, the agility of system is improved. And it solves the problem of using automation technology in ocean, dynamic object, backland etc. This paper introduces the design for the system.

基于无线数传技术的数据采集系统》解决一套新型先进的远程数据采集技术,将短距离无线数传技术和GPRS数传技术相结合很好地应用于工业测控系统中,提高测控系统的灵活性,彻底解决现代自动化技术在海洋、移动物体、偏僻地区等不宜连线环境中应用的技术难题。

Paper making is one of the important pillar industry and using bagasse as raw material for paper making is the characteristic in Guangxi.

中文摘要:造纸工业是广西的重要支柱产业,利用蔗渣作为原料造纸是广西的特色,但是蔗渣在堆放过程中产生大量的臭气,污染环境,影响了居民的生活。

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推荐网络例句

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47:5 法老对约瑟说,你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法,同时,采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。

Hey Big Raven, The individual lies dont matter anymore - its ALL a tissue of lies in support of...

嘿大乌鸦,个别谎言的事不要再-其所有的组织的谎言,在支持。